ZA9811447B - Eas marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element. - Google Patents

Eas marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element.

Info

Publication number
ZA9811447B
ZA9811447B ZA9811447A ZA9811447A ZA9811447B ZA 9811447 B ZA9811447 B ZA 9811447B ZA 9811447 A ZA9811447 A ZA 9811447A ZA 9811447 A ZA9811447 A ZA 9811447A ZA 9811447 B ZA9811447 B ZA 9811447B
Authority
ZA
South Africa
Prior art keywords
length
active element
magnetic anisotropy
oriented transversely
flux concentrators
Prior art date
Application number
ZA9811447A
Inventor
Sylvie R Morin
Wing K Ho
Kevin R Coffey
Original Assignee
Sensormatic Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of ZA9811447B publication Critical patent/ZA9811447B/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2431—Tag circuit details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Particle Accelerators (AREA)
ZA9811447A 1998-01-29 1998-12-14 Eas marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element. ZA9811447B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/015,236 US6023226A (en) 1998-01-29 1998-01-29 EAS marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element

Publications (1)

Publication Number Publication Date
ZA9811447B true ZA9811447B (en) 1999-07-12

Family

ID=21770275

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9811447A ZA9811447B (en) 1998-01-29 1998-12-14 Eas marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element.

Country Status (9)

Country Link
US (1) US6023226A (en)
EP (1) EP1072027A4 (en)
JP (1) JP2002502080A (en)
AR (1) AR014435A1 (en)
AU (1) AU757863B2 (en)
BR (1) BR9814806A (en)
CA (1) CA2318213A1 (en)
WO (1) WO1999039314A1 (en)
ZA (1) ZA9811447B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8232888B2 (en) 2007-10-25 2012-07-31 Strata Proximity Systems, Llc Interactive magnetic marker field for safety systems and complex proximity warning system
US8446277B2 (en) 2007-10-25 2013-05-21 Strata Proximity Systems, Llc Proximity warning system with silent zones

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815583A1 (en) * 1998-04-08 1999-10-14 Meto International Gmbh Element for electronic article surveillance or for sensor technology
US6525661B2 (en) * 1999-02-26 2003-02-25 3M Innovative Properties Company Electronic article surveillance markers for optically recorded media
WO2002006547A1 (en) * 2000-07-17 2002-01-24 Nhk Spring Co., Ltd. Magnetic marker and its manufacturing method
GB2411794A (en) * 2004-03-05 2005-09-07 A C S Advanced Coding Systems A magnetic tag comprised of a soft magnetic unit and a hard magnetic unit having coercivity higher than 1000oe

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790945A (en) * 1968-03-22 1974-02-05 Stoplifter Int Inc Open-strip ferromagnetic marker and method and system for using same
US4075618A (en) * 1976-07-15 1978-02-21 Minnesota Mining And Manufacturing Company Magnetic asymmetric antipilferage marker
US4797658A (en) * 1984-11-26 1989-01-10 Sensormatic Electronics Corporation Article surveillance marker capable of being deactivated by relieving the retained stress therein and method and system for deactivating the marker
US4710754A (en) * 1986-09-19 1987-12-01 Minnesota Mining And Manufacturing Company Magnetic marker having switching section for use in electronic article surveillance systems
US4980670A (en) * 1987-11-04 1990-12-25 Sensormatic Electronics Corporation Deactivatable E.A.S. marker having a step change in magnetic flux
US5204526A (en) * 1988-02-08 1993-04-20 Fuji Electric Co., Ltd. Magnetic marker and reading and identifying apparatus therefor
US5565849A (en) * 1995-02-22 1996-10-15 Sensormatic Electronics Corporation Self-biased magnetostrictive element for magnetomechanical electronic article surveillance systems
JPH08186019A (en) * 1994-11-02 1996-07-16 Unitika Ltd Magnetic marker
JP3372117B2 (en) * 1994-12-08 2003-01-27 ユニチカ株式会社 Magnetic marker and method for manufacturing the same
US5519379A (en) * 1995-04-10 1996-05-21 Sensormatic Electronics Corporation Multi-thread re-entrant marker with simultaneous switching
US5777553A (en) * 1996-09-06 1998-07-07 Sensormatic Electronics Corporation Electronic article surveillance protection for printed circuit boards
US5801630A (en) * 1996-11-08 1998-09-01 Sensormatic Electronics Corporation Article surveillance magnetic marker having an hysteresis loop with large barkhausen discontinuities at a low field threshold level
US5835016A (en) * 1997-12-15 1998-11-10 Sensormatic Electronics Corporation Multi-thread re-entrant marker with transverse anisotropy flux concentrators

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8232888B2 (en) 2007-10-25 2012-07-31 Strata Proximity Systems, Llc Interactive magnetic marker field for safety systems and complex proximity warning system
US8446277B2 (en) 2007-10-25 2013-05-21 Strata Proximity Systems, Llc Proximity warning system with silent zones
US8810390B2 (en) 2007-10-25 2014-08-19 Strata Proximity Systems, Llc Proximity warning system with silent zones
US8847780B2 (en) 2007-10-25 2014-09-30 Strata Proximity Systems, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US9466216B2 (en) 2007-10-25 2016-10-11 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US9898930B2 (en) 2007-10-25 2018-02-20 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US10170000B2 (en) 2007-10-25 2019-01-01 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US10467902B2 (en) 2007-10-25 2019-11-05 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US10769955B2 (en) 2007-10-25 2020-09-08 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US11380205B2 (en) 2007-10-25 2022-07-05 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection
US11790784B2 (en) 2007-10-25 2023-10-17 Strata Safety Products, Llc Proximity detection system and method and collision avoidance system and method using proximity detection

Also Published As

Publication number Publication date
WO1999039314A1 (en) 1999-08-05
JP2002502080A (en) 2002-01-22
CA2318213A1 (en) 1999-08-05
US6023226A (en) 2000-02-08
AR014435A1 (en) 2001-02-28
EP1072027A4 (en) 2002-05-22
AU1942199A (en) 1999-08-16
BR9814806A (en) 2000-10-17
EP1072027A1 (en) 2001-01-31
AU757863B2 (en) 2003-03-06

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